System Options:
Heating Stage 1000 °C / Heating Stage 1500 °C
9-36
FIGURE 9-29
HEATING STAGE ASSEMBLY
•
The dovetail
mounting adapter
enables to attach the Heating
stage to the microscope stage.
•
The
Heating stage base
(5) holds all components.
•
The
Top
and
Bottom Insulators
(2 and 3) are a disk-shaped pads
made of aluminous foam, placed inside the assembly.
•
The
Heater
sits between the top and bottom insulators. It is a
micro-furnace in which samples are heated from the sides,
allowing uniform temperature gradients. It includes the heating
element, thermocouple, ceramic connectors (4) and crucible, in
which the sample is placed.
•
The
Cover Plate
(1) holds the heating stage components in place.
•
Two ceramic papers (
Heater cover
and
Heater cover 2
)
sit on top
of the top insulator; they reduce heat losses from the heater and
protect the insulators.
To remove the crucible from the stage assembly, grasp the edge of
the crucible with a pair of tweezers and lift it out. There is a hole in
the bottom of the stage which can be used to remove the crucible,
should it become stuck in the heater. Use a small rod or wooden
stick to access the crucible through this hole.
Chamber Feed-through Plate
Same as for the Cooling stage (see above).
Water Chiller, Flow Box and Cooling Water Hoses
Same as for the Cooling stage (see above).
Heating Stage Controller
This microprocessor-controlled board provides accurate and stable
automatic temperature control of the heating stage and interfaces with
the xT microscope Control software. It has an internal temperature
limit for either stage to protect the equipment.
The temperature measurement accuracy is determined by the
thermocouple and the controller. These specifications are as follows:
•
HS sensor accuracy:
± 1 °C
•
HS 1000 normal operating range / limit temperature:
up to 1000 °C / 1100 °C
•
HS 1500 normal operating range / limit temperature:
up to 1500 °C / 1530 °C
Additionally, accuracy of temperatures readout depends on sample
conductivity, thickness, shape and general thermoelectric properties
that vary by sample and mounting method.
Summary of Contents for Quanta FEG 250
Page 8: ...C vi...
Page 28: ...System Operation Quanta FEG System States 3 10...
Page 108: ...Alignments 1 Gun Alignment 6 6...
Page 114: ...Alignments 154 Water Bottle Venting 6 12 154 Water Bottle Venting...
Page 152: ...System Options Automatic Aperture System 9 4...
Page 154: ...System Options Nav Cam 9 6 401 NAV CAM AUTOBRIGHTNESS...
Page 177: ...System Options Cooling Stage Waterless Cooling Stage 9 29...
